1 files changed, 80 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/tile/nptl/vfork.S b/ports/sysdeps/unix/sysv/linux/tile/nptl/vfork.S
new file mode 100644
index 0000000000..ddf9a7ae6e
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/tile/nptl/vfork.S
@@ -0,0 +1,80 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#define __ASSEMBLY__  /* for kernel headers */
+#include <linux/sched.h>
+#include <asm/signal.h>
+#include <tcb-offsets.h>
+
+/* Clone the calling process, but without copying the whole address space.
+   The calling process is suspended until the new process exits or is
+   replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
+   and the process ID of the new process to the old process.  */
+
+	.text
+ENTRY (__vfork)
+	{
+	 addli r11, tp, PID_OFFSET	/* Point at PID. */
+	 movei r13, 1
+	}
+	{
+	 LD4U r12, r11			/* Load the saved PID.  */
+	 shli r13, r13, 31		/* Build 0x80000000. */
+	}
+	sub r12, zero, r12		/* Negate it.  */
+#ifndef PT_VFORK
+	CMOVEQZ r12, r12, r13		/* Replace zero pids.  */
+#endif
+	ST4 r11, r12			/* Store the temporary PID.  */
+
+	{
+	 moveli r0, CLONE_VFORK | CLONE_VM | SIGCHLD
+	 move r1, zero
+	}
+	{
+	 move r2, zero
+	 move r3, zero
+	}
+	moveli TREG_SYSCALL_NR_NAME, __NR_clone
+	swint1
+
+	BEQZ r0, 1f			/* If we are the parent... */
+	{
+	 addli r11, tp, PID_OFFSET	/* Point at PID. */
+	 movei r13, 1
+	}
+	{
+	 LD4U r12, r11			/* Load the saved PID.  */
+	 shli r13, r13, 31		/* Build 0x80000000. */
+	}
+	{
+	 CMPEQ r13, r12, r12		/* Test for that value. */
+	 sub r12, zero, r12		/* Re-negate it.  */
+	}
+#ifndef PT_VFORK
+	CMOVNEZ r12, r13, zero		/* Replace zero pids.  */
+#endif
+	ST4 r11, r12			/* Restore the PID.  */
+1:
+	BNEZ r1, 0f
+	jrp lr
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)